RSC AdvancesPub Date : 2025-04-22DOI: 10.1039/D5RA01412C
Yinqi Yang, Guoshuai Ma, Xiaoli Hu, Wei Wang, Zhonglin Du, Yao Wang, Xue-zhong Gong, Haoyu Tan, Fengxiang Guo and Jianguo Tang
{"title":"Hollow flower-like WO3@TiO2 heterojunction microspheres for the photocatalytic degradation of rhodamine B and tetracycline†","authors":"Yinqi Yang, Guoshuai Ma, Xiaoli Hu, Wei Wang, Zhonglin Du, Yao Wang, Xue-zhong Gong, Haoyu Tan, Fengxiang Guo and Jianguo Tang","doi":"10.1039/D5RA01412C","DOIUrl":"https://doi.org/10.1039/D5RA01412C","url":null,"abstract":"<p >In the context of sustainable development, the utilization of semiconductor materials for the degradation of dyes, antibiotics, heavy metals, and pesticides in wastewater under visible light has emerged as a focal point of contemporary research. In this investigation, a WO<small><sub>3</sub></small>@TiO<small><sub>2</sub></small> composite was synthesized <em>via</em> a solvothermal method, with the composite exhibiting a molar ratio of 5% WO<small><sub>3</sub></small> to TiO<small><sub>2</sub></small> precursors demonstrating optimal photocatalytic degradation performance. This material achieved complete degradation of 20 mg per L Rhodamine B (RhB) dye and tetracycline (TC) antibiotic within 30 min. Furthermore, the effects of initial pollutant concentration and solution pH on catalytic efficacy were systematically explored. The findings revealed that at RhB concentrations below 40 mg L<small><sup>−1</sup></small>, the degradation proceeded at an accelerated rate, with a rate constant exceeding 0.128 min<small><sup>−1</sup></small>. The catalyst exhibited robust performance across a broad pH range, attaining peak degradation efficiency at pH ≈ 3. The exceptional photocatalytic prowess of the WO<small><sub>3</sub></small>@TiO<small><sub>2</sub></small> composite is predominantly attributable to its distinctive hollow microstructure, the intimate interfacial synergy between WO<small><sub>3</sub></small> and TiO<small><sub>2</sub></small>, and the efficient separation of photogenerated electrons and holes facilitated by the type-II heterojunction architecture.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 16","pages":" 12629-12644"},"PeriodicalIF":3.9,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ra/d5ra01412c?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143856390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
RSC AdvancesPub Date : 2025-04-22DOI: 10.1039/D4RA08926J
William Meza-Morales, Sahimy Ayus-Martinez, Jesus Jimenez-Osorio, Maria Buendia-Otero, Luis López, David Suleiman, Edu Suarez, Donald O. Freytes, Lisandro Cunci and Camilo Mora
{"title":"Functionalized screen-printed electrodes for non-invasive detection of vascular-endothelial cadherin in extracellular vesicles†","authors":"William Meza-Morales, Sahimy Ayus-Martinez, Jesus Jimenez-Osorio, Maria Buendia-Otero, Luis López, David Suleiman, Edu Suarez, Donald O. Freytes, Lisandro Cunci and Camilo Mora","doi":"10.1039/D4RA08926J","DOIUrl":"https://doi.org/10.1039/D4RA08926J","url":null,"abstract":"<p >In this study, we developed a biosensor using a gold screen-printed electrode (Au-SPE) functionalized with mercaptoundecanoic acid (MUA) and an antibody for detecting the vascular-endothelial cadherin (CD144) as a endothelial biomarker protein on extracellular vesicles (EVs) isolated from saliva. The MUA functionalization provides a stable platform for immobilizing the CD144 antibody, ensuring the detection of the target protein. This biosensor combines Au-SPE technology with an immunoassay, offering a rapid, sensitive, and non-invasive method for detection of CD144 carried by EVs. Characterization of saliva-derived EVs using transmission electron microscopy (TEM) and nanoparticle tracking analysis (NTA) confirmed their morphology and size, which fell within the expected range of 80–180 nm. NTA indicated a lower concentration of particles in saliva-EVs than in serum-EVs (controls), highlighting the need for sensitive detection of EV cargos in this type of EV. Immunodetection confirmed the presence of CD144 in both saliva and serum-derived EVs, with higher concentrations in serum. Functionalization of Au-SPEs with MUA and CD144 antibodies was confirmed by significant resistance changes, and atomic force microscopy (AFM) was used to verify the preservation of EV morphology and their capturing post-immune adsorption. A calibration curve demonstrated the high sensitivity of the biosensor prototype for detecting CD144-positive EVs, with a limit of detection (LOD) of 0.111 ng mL<small><sup>−1</sup></small> and a limit of quantification (LOQ) of 0.37 ng mL<small><sup>−1</sup></small>, requiring only 3 μL of EV-sample. This biosensor shows potential as a novel method for detecting and studying endothelial biomarkers associated with cardiovascular disease in EVs isolated from saliva, a capability not currently available with existing tools. Furthermore, it provides a key platform for expanding research to other biomarkers and diseases by monitoring protein cargos in the EVs, enhancing its utility across diverse clinical applications.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 16","pages":" 12609-12621"},"PeriodicalIF":3.9,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ra/d4ra08926j?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143856403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
RSC AdvancesPub Date : 2025-04-22DOI: 10.1039/D5RA01023C
Tatsuhiro Matsumae and Hidetoshi Miyazaki
{"title":"Nd-oxide-based nanoparticle-embedded transparent and photoluminescent composite films","authors":"Tatsuhiro Matsumae and Hidetoshi Miyazaki","doi":"10.1039/D5RA01023C","DOIUrl":"https://doi.org/10.1039/D5RA01023C","url":null,"abstract":"<p >In this study, we fabricated Nd-based PL composites by embedding Nd compounds in a transparent resin and investigated the relationship between the size of Nd-based particles and PL properties. Nd(<small>III</small>)-based photoluminescent composite films were fabricated using neodymium nitrate hexahydrate and transparent urethane resin. The resulting Nd-based composite film was pale blue in color. The composite films exhibited near-infrared PL properties with a peak at 1.06 μm (<small><sup>4</sup></small>F<small><sub>3/2</sub></small> → <small><sup>4</sup></small>I<small><sub>11/2</sub></small>) by irradiation with UV-visible-near-infrared light using a halogen lamp. In the case of the composite film, further irradiation with UV light (using a Hg lamp) for 2 h or less resulted in the film showing strong PL at 1.06 μm under halogen lamp irradiation. Upon UV irradiation for more than 2 h, the film turned brown owing to the reaction of urethane with nitric acid derived from the Nd raw material, and the PL intensity became weaker. The Nd<small><sub>2</sub></small>O<small><sub>3</sub></small> nanoparticles in the composite film were measured using transmission electron microscopy, and the particle size ranged from 15.0–35.1 nm. The PL intensity of the composite films was strongest when the size of the Nd-based particles was approximately 20 nm.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 17","pages":" 12959-12963"},"PeriodicalIF":3.9,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ra/d5ra01023c?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143861011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
RSC AdvancesPub Date : 2025-04-22DOI: 10.1039/D5RA00526D
Ibrahim H. Eissa, Alaa Elwan, Mustafa A. Al-Qadhi, Dalal Z. Husein, Fatma G. Amin, Aisha A. Alsfouk, Eslam B. Elkaeed, Hazem Elkady and Ahmed M. Metwaly
{"title":"Targeting VEGFR-2 in breast cancer: synthesis and in silico and in vitro characterization of quinoxaline-based inhibitors†","authors":"Ibrahim H. Eissa, Alaa Elwan, Mustafa A. Al-Qadhi, Dalal Z. Husein, Fatma G. Amin, Aisha A. Alsfouk, Eslam B. Elkaeed, Hazem Elkady and Ahmed M. Metwaly","doi":"10.1039/D5RA00526D","DOIUrl":"https://doi.org/10.1039/D5RA00526D","url":null,"abstract":"<p >A novel series of quinoxaline derivatives was designed and synthesized to target VEGFR-2, a receptor critical in cancer progression, with a focus on favorable pharmacophoric features. Among these derivatives, compound <strong>11d</strong> emerged as a promising candidate, exhibiting potent cytotoxicity against MDA-MB-231 and MCF-7 cancer cell lines, with IC<small><sub>50</sub></small> values of 21.68 μM and 35.81 μM, respectively, while displaying significantly reduced toxicity in normal cell lines WI-38 and WISH (IC<small><sub>50</sub></small> values of 82.46 μM and 75.27 μM). Compared to standard treatments doxorubicin and sorafenib, compound <strong>11d</strong> demonstrated a favorable therapeutic window. Inhibition assays showed that <strong>11d</strong> inhibits VEGFR-2 with an IC<small><sub>50</sub></small> of 62.26 nM ± 2.77, comparable to sorafenib. Mechanistically, treatment with <strong>11d</strong> upregulated pro-apoptotic markers BAX, caspase-8, and caspase-9, while downregulating the anti-apoptotic marker Bcl-2, resulting in a significant BAX/Bcl-2 ratio increase (16.11). A wound healing assay confirmed <strong>11d</strong>'s anti-migratory effects, limiting wound closure in MDA-MB-231 cells to 27.51% compared to untreated cells. Additionally, flow cytometry revealed that <strong>11d</strong> induced both early (46.43%) and late apoptosis (31.49%) in MDA-MB-231 cells, alongside G1 phase cell cycle arrest, reducing S and G2/M phase progression. Molecular docking and dynamics simulations over 200 ns demonstrated stable binding of compound <strong>11d</strong> to VEGFR-2, with docking scores superior and comparable to sorafenib. Density Functional Theory (DFT) calculations underscored <strong>11d</strong>'s stability and reactivity, while <em>in silico</em> ADMET analysis predicted a favorable safety profile over sorafenib, particularly with respect to carcinogenic and chronic toxicity risks. These findings indicate that quinoxaline derivative <strong>11d</strong> holds potential as a selective and effective VEGFR-2 inhibitor with promising antitumor and anti-metastatic properties, warranting further investigation.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 17","pages":" 12896-12916"},"PeriodicalIF":3.9,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ra/d5ra00526d?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143861071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
RSC AdvancesPub Date : 2025-04-22DOI: 10.1039/D4RA08879D
M. Aravind, Haider Butt and Sajan Daniel George
{"title":"In situ reduced gold nanoparticles in PDMS contact lenses for color blindness management†","authors":"M. Aravind, Haider Butt and Sajan Daniel George","doi":"10.1039/D4RA08879D","DOIUrl":"https://doi.org/10.1039/D4RA08879D","url":null,"abstract":"<p >Color vision deficiency, or color blindness, is an ocular condition in which individuals have difficulty distinguishing between certain colors. While there is currently no cure for this condition, various wearables can be used to improve the color perception of those affected. The most common wearables used are color-filtering glasses and lenses, which filter out the problematic wavelengths. The most prevalent form of color vision deficiency is red-green color blindness. In this study, gold nanoparticles were <em>in situ</em> reduced onto contact lens material, forming plasmonic contact lenses targeted for red-green color blindness management. The absorption of the plasmonic particles, which peaked at around 533 nm, filtered out specific wavelengths to significantly enhance the color perception of both deuteranopia and protanopia. The study also presented an approach of imaging through the plasmonic lenses, followed by color blindness vision simulation to replicate a colorblind individual's vision. When combined with the Ishihara test, this approach proved to effectively improve color perception with the use of plasmonic contact lenses. The study presents a facile method for creating stable, hydrophilic plasmonic contact lenses to manage color blindness. It also offers a unique way to simulate the impact of color filtering on the vision of individuals with color blindness.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 16","pages":" 12765-12772"},"PeriodicalIF":3.9,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ra/d4ra08879d?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143856386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
RSC AdvancesPub Date : 2025-04-22DOI: 10.1039/D5RA01275A
Sruthi Laakshmi Mugundhan and Mothilal Mohan
{"title":"Hyaluronic acid-coated capecitabine nanostructures for CD44 receptor-mediated targeting in breast cancer therapy†","authors":"Sruthi Laakshmi Mugundhan and Mothilal Mohan","doi":"10.1039/D5RA01275A","DOIUrl":"https://doi.org/10.1039/D5RA01275A","url":null,"abstract":"<p >Hyaluronic acid-coated capecitabine-loaded nanomicelles (HA-CAP-M) are synthesized to overcome the challenges associated with capecitabine (CAP) conventional delivery such as low permeability and systemic toxicity. Nanomicelles containing saponin, glycerol, and vitamin-E TPGS formulation of capecitabine were further encapsulated with hyaluronic acid (HA) for CD44 receptor-mediated targeting. Optimization of the formulation was carried out using a Box–Behnken design resulting in 17.8 nm particle size, 89.3% entrapment efficiency and a biphasic drug release profile. Characterization studies validated stability, spherical structure, and desirable encapsulation characteristics of the nanomicelles. Lowered critical micelle concentration (CMC) and acceptable drug release kinetics revealed improved thermodynamic stability and controlled drug release, as predicted by the Hixson–Crowell model. HA-CAP-M showed much higher permeability and cytotoxicity than the free CAP, with an IC<small><sub>50</sub></small> of 2.964 μg mL<small><sup>−1</sup></small> in <em>in vitro</em> experiments. AO/PI staining also demonstrated dose-dependent apoptosis in MCF-7 breast cancer cells and validated the highly effective active targeting of HA. In addition, the formulation demonstrated good stability during storage and dilution conditions, confirming its stability as a drug delivery platform. In conclusion, HA-functionalized nanomicelles provide a biocompatible and efficient system for the targeted breast cancer therapy, enhancing the therapeutic efficacy of capecitabine.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 16","pages":" 12653-12670"},"PeriodicalIF":3.9,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ra/d5ra01275a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143856388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
RSC AdvancesPub Date : 2025-04-22DOI: 10.1039/D5RA01462J
Robin Roper, Ruchi Gakhar, Alejandro Ramos Ballesteros and Ammon Williams
{"title":"A high-temperature optical cell for chemical analysis of vapor using combined spectroscopy approaches","authors":"Robin Roper, Ruchi Gakhar, Alejandro Ramos Ballesteros and Ammon Williams","doi":"10.1039/D5RA01462J","DOIUrl":"https://doi.org/10.1039/D5RA01462J","url":null,"abstract":"<p >This paper introduces a novel optical cell design that integrates ultraviolet-visible (UV-vis) and laser-induced breakdown spectroscopy (LIBS) for comprehensive vapor phase chemical analysis at temperatures up to 450 °C. The motivation behind this research is to overcome the limitations of existing vapor phase spectroscopy techniques by providing a versatile and efficient solution for detailed chemical analysis in high-temperature environments. The modular design of the optical cell enables the optimization of optical path length and beam diameter to meet the specific requirements of each spectroscopy technique. Experimental results demonstrated good resolution when analyzing both organic (naphthalene) and inorganic (SbCl<small><sub>5</sub></small>) vapors. A key innovation discussed is the implementation of a cover gas buffer to prevent material buildup on the optical windows, ensuring the integrity and longevity of the cell during extended operation. This approach enhances the capabilities of existing techniques and extends their applicability to various scientific and industrial applications, including environmental monitoring, pharmaceuticals, materials science, and chemical manufacturing.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 16","pages":" 12563-12576"},"PeriodicalIF":3.9,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ra/d5ra01462j?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143856402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Polymerization of 1,3-butadiene catalyzed by Co(ii) and Ni(ii) complexes of 6,6′-dihydroxy-2,2′-bipyridine ligands: 1,4-cis-polymerization versus isospecific 1,2-polymerization†","authors":"Shinji Yamakawa, Daisuke Takeuchi, Kohtaro Osakada, Shigenaga Takano and Shojiro Kaita","doi":"10.1039/D5RA00928F","DOIUrl":"https://doi.org/10.1039/D5RA00928F","url":null,"abstract":"<p >Co and Ni complexes having the 6,6′-dihydroxy-2,2′-bipyridine (DHBP) ligand [CoCl<small><sub>2</sub></small>(dhbp), NiBr<small><sub>2</sub></small>(dhbp)] in the presence of organoaluminum cocatalysts showed much higher catalytic activity in 1,3-butadiene polymerization than the complexes having the 2,2′-bipyridine or 6,6′-dimethoxy-2,2′-bipyridine ligand without hydroxy groups. The polybutadienes obtained had 1,4-<em>cis</em> structure (up to 94.6%). In contrast, addition of 5-norbornene-2-methyl amine in 1,3-butadiene polymerization catalyzed by NiBr<small><sub>2</sub></small>(dhbp)/methylaluminoxane (MAO) caused a marked change in the microstructure of the polybutadiene to the <em>iso</em>-1,2-structure with high chemo- and stereoselectivities (mm > 99%).</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 16","pages":" 12557-12562"},"PeriodicalIF":3.9,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ra/d5ra00928f?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143856404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
RSC AdvancesPub Date : 2025-04-22DOI: 10.1039/D4RA09048A
Jiping Li, Hong Liang, Likun Liu, Xiuli Gao, Yang Liu, Meng Zhang, Xiaoan Yuan, Shan Ren and Wei Zhang
{"title":"Structural diversity and biological activities of terpenoids derived from Tripterygium wilfordii Hook. f.","authors":"Jiping Li, Hong Liang, Likun Liu, Xiuli Gao, Yang Liu, Meng Zhang, Xiaoan Yuan, Shan Ren and Wei Zhang","doi":"10.1039/D4RA09048A","DOIUrl":"https://doi.org/10.1039/D4RA09048A","url":null,"abstract":"<p >Terpenoids, a heterogeneous group of natural products, have garnered considerable attention in the field of drug discovery. This is attributed to their vast diversity, intricate structural features, and extensive biological activities. <em>Tripterygium wilfordii</em> Hook. f., a traditional medicinal plant with widespread application in East Asia, is particularly enriched in terpenoids, which can be classified into sesquiterpenoids, diterpenoids, and triterpenoids. The present review provides a comprehensive elaboration of the chemical structures and biological activities of 217 terpenoids isolated from <em>T. wilfordii</em>. The purpose is to shed light on their potential in pharmacological research and to stimulate innovative drug discovery as well as clinical applications. These terpenoids display a broad spectrum of biological activities, such as antitumor, anti – inflammatory, immunosuppressive, and other therapeutic effects. Nevertheless, their clinical application is impeded by issues related to toxicity and poor bioavailability. Future research efforts should be concentrated on exploring effective strategies to alleviate toxicity and enhance drug delivery systems. In addition, in – depth investigation into the structure–activity relationships and the identification of new active constituents are crucial for the development of more potent and safer drugs. This review serves as an exhaustive reference for the discovery and development of novel drugs based on the natural active products of <em>T. wilfordii</em>, providing valuable insights and guidance for researchers in the relevant field.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 16","pages":" 12594-12608"},"PeriodicalIF":3.9,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ra/d4ra09048a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143856406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
RSC AdvancesPub Date : 2025-04-22DOI: 10.1039/D5RA00587F
Hossein Mojtabazadeh and Javad Safaei-Ghomi
{"title":"High conductivity graphite paste for radio frequency identification tag with wireless hydrogen sensor based on CeO2–Fe2O3–graphene oxide†","authors":"Hossein Mojtabazadeh and Javad Safaei-Ghomi","doi":"10.1039/D5RA00587F","DOIUrl":"https://doi.org/10.1039/D5RA00587F","url":null,"abstract":"<p >Radio frequency identification (RFID) technology has made significant strides in recent years, opening up a world of possibilities for various industries. However, to achieve success, reliable and accurate real-time data is crucial. One exciting application of RFID technology is fast and wireless detection of gases. Hydrogen, in particular, is considered a clean fuel. However, it is highly flammable, and detecting it quickly and accurately is challenging in various industries. In this regard, our research focuses on developing a high-conductivity graphite paste for RFID tags integrated with a wireless hydrogen sensor based on nano-CeO<small><sub>2</sub></small>–Fe<small><sub>2</sub></small>O<small><sub>3</sub></small>–graphene oxide. In this work, we obtained a graphite paste using Ultra High Power (UHP) graphite electrodes with a high conductivity of 4.75 × 10<small><sup>5</sup></small> S cm<small><sup>−1</sup></small> for non-metallic substrates and 4 × 10<small><sup>6</sup></small> S cm<small><sup>−1</sup></small> with aluminum substrate. Furthermore, we incorporated a hydrogen gas detection sensor into the RFID tag utilizing graphene oxide and cerium oxide–iron oxide nanoparticles. The sensor demonstrated high sensitivity to low concentrations of H<small><sub>2</sub></small> gas (1 ppm), with stable and repeatable performance. The wireless sensing response was evaluated through reflection coefficient (<em>S</em><small><sub>11</sub></small>) measurements, confirming effective impedance matching between the RFID chip and antenna. Through this research, we aim to promote the advancement of RFID technology by introducing a low-cost, battery-free sensing platform using graphite and nano-engineered materials, suitable for diverse industrial applications.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 16","pages":" 12773-12784"},"PeriodicalIF":3.9,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ra/d5ra00587f?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143856356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}